Configure Samba / Kerberos and LDAP on Red Hat

If I need to allow my AD users to access the Red Hat server, and the Red Hat server is enabled to user the shared resource in Window domain, do I need to do enable Samba and Kerberos/LDAP on the Red Hat, or either one ?

As a web developer or IT admin, successfully managing multiple client accounts can be challenging. In this webinar we will look at the tools provided by Media Temple and Plesk to make managing your clients’ hosting easier.